From Nuclotron Synchrotron to NICA Collider—Common Cryogenic Concept for Various Superconducting Magnets, Their Design Specifics and Test Results

The forced flow two phase helium cooling concept of superconducting magnets in parallel channels works successfully since the commissioning of the Nuclotron accelerator at the Joint Institute for Nuclear Research (JINR) in Dubna in 1993. We summarize its main cryogenic aspects and describe the optimization factors for further design of high or low current magnets designated for fast cycling or near DC mode. An overview of the main magnets design and related characteristic test results for the Booster and the Collider of the Nuclotron-based Ion Collider Facility (NICA complex) will be presented, as well as the measured magnetic field parameters. A brief information about the project status will be given.